1977 Unnamed North Indian Ocean Cyclone
● Data reliability: Generally reliable——Aircraft entered typhoons for in situ measurements, but satellites were not yet widespread: tracks are generally accurate, while intensities may be biased, with weaker cyclones potentially going unrecorded from 1950 until the advent of satellite coverage.
未命名 at 1977-05-09 08:00:00 (BeijingTime) 在North Indian Ocean首次被记录, peak intensity 为强The Cyclone Storm, max wind 约 30.9 m/s (1 分钟平均) , at 1977-05-13 20:00:00前后结束, total 记录 19 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1977-05-09 08:00 | 7.6°N, 84.4°E | Tropical Cyclone | - | - |
| 1977-05-09 14:00 | 8.1°N, 85.2°E | Tropical Cyclone | - | - |
| 1977-05-09 20:00 | 9.0°N, 85.3°E | Tropical Cyclone | - | - |
| 1977-05-10 02:00 | 10.2°N, 84.4°E | Tropical Cyclone | - | - |
| 1977-05-10 08:00 | 11.5°N, 83.7°E | Tropical Cyclone | - | - |
| 1977-05-10 14:00 | 12.6°N, 84.2°E | Tropical Cyclone | - | - |
| 1977-05-10 20:00 | 13.5°N, 84.9°E | Tropical Cyclone | - | - |
| 1977-05-11 02:00 | 14.2°N, 85.5°E | Tropical Cyclone | - | - |
| 1977-05-11 08:00 | 14.9°N, 86.1°E | Tropical Cyclone | - | - |
| 1977-05-11 14:00 | 16.0°N, 86.7°E | Tropical Cyclone | - | - |
| 1977-05-11 20:00 | 17.1°N, 87.4°E | Tropical Cyclone | - | - |
| 1977-05-12 02:00 | 18.0°N, 88.0°E | 强The Cyclone Storm | 28.3 | - |
| 1977-05-12 08:00 | 18.8°N, 88.6°E | 强The Cyclone Storm | 28.3 | - |
| 1977-05-12 14:00 | 19.9°N, 89.2°E | 强The Cyclone Storm | 30.9 | - |
| 1977-05-12 20:00 | 21.0°N, 89.8°E | 强The Cyclone Storm | 25.7 | - |
| 1977-05-13 02:00 | 21.5°N, 90.2°E | The Cyclone Storm | 20.6 | - |
| 1977-05-13 08:00 | 22.0°N, 90.5°E | Deep Depression | 18 | - |
| 1977-05-13 14:00 | 22.9°N, 90.6°E | Deep Depression | 15.4 | - |
| 1977-05-13 20:00 | 24.0°N, 90.6°E | Tropical Cyclone | - | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1977129N08084 / IO011977. This basin has no official Chinese name, so the original English name is used. Intensity grades follow the classifications of the local agency in the region, converted from 1-minute sustained winds using the WMO factor, for reference only. Data notes · Incorrect translation?
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